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ee.Number.atan
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计算输入的反正切值（以弧度为单位）。
示例
代码编辑器 (JavaScript)
print('Arctangent of -1e13', ee.Number(-1e13).atan()); // -1.570796326 (-π/2)
print('Arctangent of -1', ee.Number(-1).atan()); // -0.785398163
print('Arctangent of 0', ee.Number(0).atan()); // 0
print('Arctangent of 1', ee.Number(1).atan()); // 0.785398163
print('Arctangent of 1e13', ee.Number(1e13).atan()); // 1.570796326 (π/2)
Python 设置
如需了解 Python API 和如何使用 geemap 进行交互式开发，请参阅
Python 环境页面。
import ee
import geemap.core as geemap
Colab (Python)
# -1.570796326 (-π/2)
print('Arctangent of -1e13:', ee.Number(-1e13).atan().getInfo())
print('Arctangent of -1:', ee.Number(-1).atan().getInfo()) # -0.785398163
print('Arctangent of 0:', ee.Number(0).atan().getInfo()) # 0
print('Arctangent of 1:', ee.Number(1).atan().getInfo()) # 0.785398163
# 1.570796326 (π/2)
print('Arctangent of 1e13:', ee.Number(1e13).atan().getInfo())
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最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003e\u003ccode\u003eNumber.atan()\u003c/code\u003e calculates the arctangent of a given input number in radians.\u003c/p\u003e\n"],["\u003cp\u003eThe input to \u003ccode\u003eNumber.atan()\u003c/code\u003e is a single number, and the function returns the arctangent of that number.\u003c/p\u003e\n"],["\u003cp\u003eThe arctangent is the inverse of the tangent function, meaning it returns the angle whose tangent is the input value.\u003c/p\u003e\n"],["\u003cp\u003eThe function provides accurate calculations across a wide range of input values, including large positive and negative numbers, as well as zero.\u003c/p\u003e\n"]]],["The `atan()` function calculates the arctangent of a given number in radians. It accepts a numerical input and returns the corresponding arctangent value as a number. The function is demonstrated with examples using inputs of -1e13, -1, 0, 1, and 1e13, showcasing the output range from -π/2 to π/2. The code examples show implementation for JavaScript and Python, where the method is called on an input number, `Number.atan()` or `ee.Number().atan()`.\n"],null,["# ee.Number.atan\n\nComputes the arctangent in radians of the input.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------|---------|\n| Number.atan`()` | Number |\n\n| Argument | Type | Details |\n|---------------|--------|------------------|\n| this: `input` | Number | The input value. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nprint('Arctangent of -1e13', ee.Number(-1e13).atan()); // -1.570796326 (-π/2)\nprint('Arctangent of -1', ee.Number(-1).atan()); // -0.785398163\nprint('Arctangent of 0', ee.Number(0).atan()); // 0\nprint('Arctangent of 1', ee.Number(1).atan()); // 0.785398163\nprint('Arctangent of 1e13', ee.Number(1e13).atan()); // 1.570796326 (π/2)\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# -1.570796326 (-π/2)\nprint('Arctangent of -1e13:', ee.Number(-1e13).atan().getInfo())\nprint('Arctangent of -1:', ee.Number(-1).atan().getInfo()) # -0.785398163\nprint('Arctangent of 0:', ee.Number(0).atan().getInfo()) # 0\nprint('Arctangent of 1:', ee.Number(1).atan().getInfo()) # 0.785398163\n# 1.570796326 (π/2)\nprint('Arctangent of 1e13:', ee.Number(1e13).atan().getInfo())\n```"]]
